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解密工具类，实现了常用的加解密类。包括单向加密：MD5、SHA；对称加密：DES、AES；非对称加密：RSA 完整代码见：https://git.oschina.net/bayern.com/SecureUtils.git 同时提供ant打包脚本。 下面展示部分关键代码MD5 单向加密： /** * 返回MD5单向加密后的十六进制字符串 * @param data * @return * @throws Exception */ public String getEncryptForHex(byte[] data) throws Exception { byte[] digestData = encrypt(data); StringBuffer hex = new StringBuffer(); for(int i = 0; i < digestdata.length;="" i++)="" ="" ="" ="" {="" ="" ="" ="" ="" ="" int="" h="((int)digestData[i])" &="" 0xff;="" ="" ="" ="" ="" ="" if(h="">< 16)="" ="" ="" ="" ="" ="" {="" ="" ="" ="" ="" ="" ="" ="" hex.append('0');="" ="" ="" ="" ="" ="" }="" ="" ="" ="" ="" ="" hex.append(integer.tohexstring(h));="" ="" ="" ="" }="" ="" ="" ="" return="" hex.tostring();="" ="" }="" des="" 对称加密类：="" ="" @override="" ="" public="" byte[]="" encrypt(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" if(secretkey="=" null="" ||="" ''.equals(secretkey))="" ="" ="" ="" {="" ="" ="" ="" ="" ="" throw="" new="" exception('scretkey="" need="" to="" exists');="" ="" ="" ="" }="" ="" ="" ="" ="" ="" ="" ="" secretkey="" md5key="getKey(secretKey);" ="" ="" ="" cipher="" cipher="Cipher.getInstance(ALGORITHM);" ="" ="" ="" cipher.init(cipher.encrypt_mode,="" md5key);="" ="" ="" ="" return="" cipher.dofinal(data);="" ="" }="" ="" @override="" ="" public="" byte[]="" decrypt(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" if(secretkey="=" null="" ||="" ''.equals(secretkey))="" ="" ="" ="" {="" ="" ="" ="" ="" ="" throw="" new="" exception('scretkey="" need="" to="" exists');="" ="" ="" ="" }="" ="" ="" ="" ="" ="" ="" ="" secretkey="" md5key="getKey(secretKey);" ="" ="" ="" cipher="" cipher="Cipher.getInstance(ALGORITHM);" ="" ="" ="" cipher.init(cipher.decrypt_mode,="" md5key);="" ="" ="" ="" return="" cipher.dofinal(data);="" ="" }="" rsa="" 非对称加密。私钥加密="" &="" 私钥解密="" &="" 私钥签名="" ="" @override="" ="" public="" byte[]="" encrypt(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" privatekey="" rsaprivatekey="getRSAPrivateKey();" ="" ="" ="" cipher="" cipher="Cipher.getInstance(ALGORITHM);" ="" ="" ="" cipher.init(cipher.encrypt_mode,="" rsaprivatekey);="" ="" ="" ="" return="" cipher.dofinal(data);="" ="" }="" ="" @override="" ="" public="" byte[]="" decrypt(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" privatekey="" rsaprivatekey="getRSAPrivateKey();" ="" ="" ="" cipher="" cipher="Cipher.getInstance(ALGORITHM);" ="" ="" ="" cipher.init(cipher.decrypt_mode,="" rsaprivatekey);="" ="" ="" ="" return="" cipher.update(data);="" ="" }="" ="" ="" ="" /**="" ="" ="" *="" 使用私钥="" 对数据进行签名="" ="" ="" *="" @param="" data="" ="" ="" *="" @return="" ="" ="" *="" @throws="" exception="" ="" ="" */="" ="" public="" string="" sign(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" privatekey="" rsaprivatekey="getRSAPrivateKey();" ="" ="" ="" signature="" signature="Signature.getInstance(SIGN_ALGORITHM);" ="" ="" ="" signature.initsign(rsaprivatekey);="" ="" ="" ="" signature.update(data);="" ="" ="" ="" return="" encoder(signature.sign());="" ="" }="" rsa="" 非对称加密。公钥加密="" &="" 公钥解密="" &="" 公钥校验签名="" ="" @override="" ="" public="" byte[]="" encrypt(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" if(publickey="=" null="" ||="" ''.equals(publickey))="" ="" ="" ="" {="" ="" ="" ="" ="" ="" throw="" new="" exception('publickey="" is="" need="" exists');="" ="" ="" ="" }="" ="" ="" ="" ="" ="" ="" ="" publickey="" rsapublickey="getRSAPublicKey(publicKey);" ="" ="" ="" cipher="" cipher="Cipher.getInstance(ALGORITHM);" ="" ="" ="" cipher.init(cipher.encrypt_mode,="" rsapublickey);="" ="" ="" ="" return="" cipher.dofinal(data);="" ="" }="" ="" @override="" ="" public="" byte[]="" decrypt(byte[]="" data)="" throws="" exception="" ="" {="" ="" ="" ="" if(publickey="=" null="" ||="" ''.equals(publickey))="" ="" ="" ="" {="" ="" ="" ="" ="" ="" throw="" new="" exception('publickey="" is="" need="" exists');="" ="" ="" ="" }="" ="" ="" ="" ="" ="" ="" ="" publickey="" rsapublickey="getRSAPublicKey(publicKey);" ="" ="" ="" cipher="" cipher="Cipher.getInstance(ALGORITHM);" ="" ="" ="" cipher.init(cipher.decrypt_mode,="" rsapublickey);="" ="" ="" ="" return="" cipher.dofinal(data);="" ="" }="" ="" /**="" ="" ="" *="" 使用公钥校验签名="" ="" ="" *="" @param="" data="" ="" ="" *="" @param="" sign="" ="" ="" *="" @return="" ="" ="" *="" @throws="" exception="" ="" ="" */="" ="" public="" boolean="" verifysign(byte[]="" data,="" string="" sign)="" throws="" exception="" ="" {="" ="" ="" ="" if(publickey="=" null="" ||="" ''.equals(publickey))="" ="" ="" ="" {="" ="" ="" ="" ="" ="" throw="" new="" exception('publickey="" is="" need="" exists');="" ="" ="" ="" }="" ="" ="" ="" ="" ="" ="" ="" publickey="" rsapublickey="getRSAPublicKey(publicKey);" ="" ="" ="" signature="" signature="Signature.getInstance(SIGN_ALGORITHM);" ="" ="" ="" signature.initverify(rsapublickey);="" ="" ="" ="" signature.update(data);="" ="" ="" ="" return="" signature.verify(decoder(sign));="" ="">via：phpxs.com |
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